Fwiw, that's not a rare issue. Usually, hrt doses and varieties being altered either fixes or reduces the difficulty.
Mind you, you didn't mention any surgical outcomes, so the above assumes there haven't been any that would affect the genitals. Otherwise, it's a way more complex situation. Hrt adjustment would still be the most probable fix, but it could be something structural as well or instead of. Which could still be the case, even if it hadn't been a problem before because there can be changes over time post genital surgeries.
You mentioned having a doctor's appointment soon, so I don't doubt that you'll find resolution eventually.